commit 231be3d0c31500e6c993ff22e48afae84c0a333c
Author: Evgeny Lensky <surfernsk@gmail.com>
Date:   Fri Nov 24 01:50:45 2017 +0700

    Fix check for system libraries in both lib64 and lib
    
    if host_cpu = [i?86] libsubdirs = "", but it is necessary libsubdirs = "lib"
    Invalid execution, superfluous comma.

diff --git a/m4/ax_boost_base.m4 b/m4/ax_boost_base.m4
index 19c71b6..2bce519 100644
--- a/m4/ax_boost_base.m4
+++ b/m4/ax_boost_base.m4
@@ -33,7 +33,7 @@
 #   and this notice are preserved. This file is offered as-is, without any
 #   warranty.
 
-#serial 42
+#serial 43
 
 # example boost program (need to pass version)
 m4_define([_AX_BOOST_BASE_PROGRAM],
@@ -114,7 +114,7 @@ AC_DEFUN([_AX_BOOST_BASE_RUNDETECT],[
     AS_CASE([${host_cpu}],
       [x86_64],[libsubdirs="lib64 libx32 lib lib64"],
       [ppc64|s390x|sparc64|aarch64|ppc64le],[libsubdirs="lib64 lib lib64"],
-      [libsubdirs="lib"],
+      [libsubdirs="lib"]
     )
 
     dnl allow for real multi-arch paths e.g. /usr/lib/x86_64-linux-gnu. Give